Apparatus for cabling threads



3 Sheets-Sheet l Oct 6, 1953 G. w. BoGDANr-'FY ET AL APPARATUS FOR CABLING THREADS Filed Nov. 10, 1948 l UCL 6, 1953 l G. w. BoGDANl-FY ET AL 2,654,210

APPARATUS FOR CABLING THREADS Filed Nov. lO, 1948 3 Sheets-Sheet 2 ,240 234 ,e3/z 250 E I L af 9L n 256 l L o 17 102 Ja 20? l zzg/ w 5 242 mir- "w (ttorneg Oct. 6, 1953 G. W. BOGDANFFY vETAL APPARATUS FOR CABLING THREADS 3` Sheets-Sheet 3 Filed Nov. 1Q, 1948y Patented Oct. 6, 1953 oFFlcE tioni. Jersey... Gity; Jersey?,

tiiiicttifttt 10 exelente: (el. mettiti.

30 tnt the material. throughout. the 'trous operi tions are governed primarily` during the cabling operation, whereby predterlriined de red tens conditions throughout allthe perat o s, incl it the Yarn. twisting. the' fitblne 0f the rsultait. et threads, and the reeling o'ftli resulting oord, r

atte/inea n .i These and futher ttjeett of the. iiiteiitieii will be more. `readily apparent iii 'the' renewing dee scripton's of preferred embodiments 'i the apf-A the "la'ilviligsV appended Beret@ all@ forming apart er the speeifieation:

rigore l is e fragmentary 'tmwliat soli View of: the general comb a on ap ra u"s` 0f. the' mst dscled tmdmelit 'fl the' iIV tion, such embodiment employing a v'retarded threaqgathering tapeten; tii'vietv' being' in elevation from a plane parallel to the es Of the yarn twisting and threetl'abliii spindles: 5o Figure 2 is a fragmentary view end 'ef tion of the thread gathering caps il arl its tarding mechanism employed ins hodiment;

Figure 3 is a fragmentary View irl end eleva 1948,.,satellieten.

tion otra; secondi embodiment of the' apparatus.of-

th'firlv'entien employinga drivenv thread gather-,

iligarid forwarding caps'tan;

Fig-ure 4 is a View axial4 section through the cabling-'spindle of the' intention, such spindle being employed inY botli errlb'odiments ofl the' gen# eral combination off apparatus in accbrdanee: Withl the intention, alfld- Figure' `5` is a frgl'r'tary View plan Olj the cabling spindle shown in Figure 4.

Eeinbiiitioii cit Sittin twisting spindles o l the"y typeereati-n'g arid xaintai deliveredtiiread'wit- 'a e'aliliiigspliidleot the type reating 'andVv m ntjaiiiing'a balloii in' trie gathered cjrds dk'elirferedV theretofjis d isclos;edf vand elalmedgio the aprilitioiiof Henry e. Uhlig, Serial 'Nol '765;517'7; led August l; 1947", I i'o'wj Patent No ansie-'silente entitled: Method i and Aliitra for. .TWSt-itie Ytitlif The tpttltttlt alla iiietiioti 6r tl'ie present. invention represent irrltottihettti r th generali .ttftbrittta the. tthiliries'llindl and th' method. 0f, totaling, cords. 0f the Said. tje'i'it, in that the. present. infV vntion. pe mits 0195er' dontrol of the; cord. at.. the ctlbljiej spindle 'and settratea the. control, of the. eabliiiei splfidl. ballot-iii from' the; Qontrol. of the 'eelie tf Ol The Dite-tent iiiveritir'l not only IIQVQS the oper n of the cabling Spindle i't-i sell, but also impr es" the operation of the combinationl of elements off. the apparatus as a Whole, singe control of thje'yarns delivered from the yarn twisting', spindles' s1. exercised `by. the.. cablingspindleg'whlollyili the. rst described embodiment aiigpaitially lri the second. Y

'el generalmcombiation of apparatus disclosed, that is, the yarn twisting spindles in combination WithA thev ablirfig. spindle to which they deliver. the threads which they produce, is capable of, use te advantage,- as' will be explained, in the formation o fcol'jds formed from a plurality Off yarnsin one ontilfiuus operation in which the yarns, threads, resulting eordtravel conti.lllijllsly.' Such ords are useful, for example,

as rein'foring'`elelilel'lts in V belts and in auto obile tires, rayon being a typical material iti'l (flirt, ing the eert-ijs ,for suth'latter use. lt' is to' bie un.. .tetti that the" apparatus 'and methed of the invention may be employed in making 4lords from yarns composed of variousA bers including tlie sytlietieeiitinuoiis filaments stiel; 'as those of rayon ol' r-yl; arida-lso yarnslllade f natural fibers suoli a-swcott'oii;l The 'l'tlld arid apparatus of the invention' may l b lis'ly adVQlsly in forming cords from fille' wire. Thus the' Words ,eyar thread and c01d,V as l'used the spindles and other attendant mechanisms.

present specification and claims, are broadly construed to include the above materials, although the invention will be particularly described in its first embodiment with the twisting of rayon yarn, and in its second embodiment with the twisting of yarn made of cotton fibers, to form cords.

It is also to be understood that the invention includes the novel cabling spindle per se, as well as the combination of it with the yarn twisirzliilg e cabling spindle of the invention obviously may be used to advantage in cabling and reeling threads from other sources than those of the yarn twisting spindles of the general combination.

In the drawings, as above explained, Figures l and 2 show the general combination of the apparatus in the embodiment thereof adapted for the formation of cords from yarns of synthetic fibers such as rayon. In Figure 3 there is shown a second embodiment of the general combination which is particularly useful in the treatment of yarns formed of cotton and the like. The cabling spindle, shown generally in Figures 1 and 3 and more specically in Figures 4 and 5, is substantially the same as that shown and described in both embodiments of the general combination.

Considering rst the general combination of the first embodiment, there is shown in Figure 1 a first yarn twisting spindle 2 and a second yarn twisting spindle 4, there being a cabling spindle 6 positioned equidistant therebetween, the axes of all such spindles lying in the same plane. The spindles are supported in a frame of which only fragments are shown, the direct support for the spindles being the horizontal rod 8 which extends longitudinally of the frame. Secured to rod 6 is the supporting member l0 for spindle 2, the supporting member l2 for spindle 4, and the supporting member I4 for spindle 6. Also suspended on rod 8 is the supporting member I8 from which the electric motor I6 is hung. Motor I6 has on its driving shaft the pulley 26 which is connected to the driving pulley 22 of spindle 2, the driving pulley 24 of spindle 4, and the driving pulley 26 of spindle 6 by means of the belt 32, such belt being supported at its end remote from the motor by means of the idler pulley 28 depending from supporting member 3G. Belt 32 has the two runs thereof on the opposite sides of pulleys 22 and 24, and has both runs on the rear side of pulley 26, as shown in Figure 3, so that spindles 2 and 4 are driven in the same direction and spindle 6 in the opposite direction, all in timed relation to each other.

Spindles 2 and 4 are generally shown as being of the type shown in Figure 1 of the application of Agresti et al., Serial No. 52,994 filed October 6, 1948, now Patent No. 2,492,778, entitled Yarn Twisting Apparatus and Method. It is to be understood, however, that other twisting spindles, although preferably of the 2 for 1 type, which create and maintain balloons in the delivered material, may be substituted in the general combination of the apparatus for those shown at 2 and 4.

Spindle 2 includes the cake or package of rayon yarn 34 supported on package support 36, member 36 being floatingly mounted on the driven shaft of the spindle so as to be maintained substantially in one angular position. Yarn 44, which is of the dat yarn type, that is, it has a rectangular cross section with the width ma- '4 terially exceeding the thickness, is fed from the package 34 through the yarn tensioning and twist barrier device, generally designated 3S, whence it issues into the driven twisting guide 40 on the driven shaft 4l of the spindle. The first twisted yarn then passes downwardly through an axial passage (not shown) in shaft 4l, and thence outwardly through a radial passage, not shown, in disc 42, the disc being keyed for rotation with shaft 4l. Yarn issuing from the passage in disc 42 passes upwardly to the guiding eye 48 positioned axially of and above the spindle, as shown. The yarn so treated by spindle 2 is given a rst twist in that portion of its travel below device 38 and above the twisting guide 40 and a second twist in that portion of its travel from the outer end of the passage in disc 42 to the guiding eye 43. By reason of the high speed of rotation of the disc 42 the thread issuing therefrom, designated 50, is thrown into a balloon 46 about the spindle.

Spindle 4 has parts similar to those of spindle 2 and the yarn treated thereby is subjected to the same steps. The balloon in the thread 58 issuing from the spindle and in the zone between twisting disc 52 of spindle 4 and eye 56 axially thereabove is designated 54. When pulleys 22 and 24 are of the saine diameter, when the yarns at the two spindles 2 and 4 are substantially identical, and when the tensions imposed upon the yarns at each of the spindles are likewise substantially identical, threads 5t and 58 will be subjected to substantially the same tension as they travel upwardly beyond their respective guiding eyes.

Threads 50 and 58 are gathered, in the iirst described embodiment of the apparatus, by the gathering capstan 60, which is positioned above and substantially equidistant from the upper ends of the balloons created and maintained by each of the yarn twisting spindles. Because, as it will later appear, when the apparatus is treating materials such as rayon the tension in the balloon of the cord entering the cabling spindle exceeds the sum of the tensions in the threads issuing from the yarn twisting spindles, the thread gathering capstan 60 is retarded. In this embodiment, capstan 60, more clearly shown in Figure 2, is mounted on the horizontal top frame member 62 through the medium of the pillow block 64. The capstan has non-rotatably attached thereto a brake drum 66 with which the brake lever 68 cooperates. Lever 63 is pivotally connected to frame member 62 by the pivot pin 10, the brake drum engaging portion of the lever being maintained in contact with the brake drum by means of an adjustable brake lever operating mechanism. Such mechanism includes the support 14 which may conveniently be a part of the machine frame, a rod 16 having a threaded upper end which extends through a hole in member 14, a wing nut 'I3 screwed upon the upper end of rod 16, and a coil spring l2 connected to the outer end of the brake lever 68 and the bottom of rod 16, as shown. The force with which the brake lever engages the brake drum and thus the amount of retardation of capstan 60 may readily be varied by adjusting the position of rod 16 and thus the tension on spring 12 by means of nut 18. The braking mechanism is adjusted so that, under constant speed conditions, the tension in the balloon in the cord entering the cabling spindle equals the sum of the tensions in the threads issuing from the spindles 2 and 4 and gathered at the capstan www upon such threads imposed capstan 601 into generally parallel relationship, I

are led around the capstan in that condition two or three times and then are directed downwardly through the guiding eye 82 which is positioned axially above the cabling spindle 6. The gathered and substantially parallel threads, as' yet untwisted on each other, are designated Sii in that portion of their travel above eye 82. From eye 82 the gathered threads are fed downwardly into a radial passage in the driven twisting disc 92 at the bottom of spindle 6.. The gathered threads are given a rst twist in `the balloon 84 between eye 82 and disc 92, the thus rst twisted cord being designated |28.

vThe structure of the cabling spindle 6 ernployed in both embodiments of the general com*- bination of the apparatus will be more clearly understood by a consideration of Figure 4i. The spindle 6 includes the driven shaft 88 which is positioned, as are the driven shafts of spindles 2 and 1|, at a small angle to the vertical as, for instance, 12, as indicated in Figure 3. Such angularity of position of the spindle shafts has the function of maintaining the bobbin supports of the yarn twisting spindles and the cord laying mechanism supporting cage of the cabling spindle in substantially one angular position. Shaft 86 is supported at its lower end in bearings in the sleeve member 88, such sleeve member being supported in the member I4 previously described. Supported on member I4, as shown, is a spindle encircling closure member 8|), which confines the balloon 84 and prevents it from becoming entangled with balloons |56A and 54 before the device has reached steady operating condition.

The improved cabling spindle of the invention is illustrated in that embodiment thereof providing means whereby the threads entering it and passing therethrough are given a 2 for 1 twist on each other before they are reeled upon the bobbin carried thereby. The improvement in the cabling spindleof the invention resides in the provision of means engaging the cord, in that portion of its travel in the spindle from the entering end of the radial passage in the twisting disc to the cord laying device, for positively forwarding the cord, such means being positively driven in synchronism with the driven shaft of the spindle. As a result of such construction, the power necessary for pulling the cord inwardly from the bottom of its balloon is supplied by the means at the spindle positively engaging and forwarding the cord, the slip driving connection such as a Variable magnetic clutch, which is preferably employed between the driven shaft of the spindle and the bobbin support, being relied upon only to impel the cord from such last named meansto the cord laying device and to wind it upon the bobbin. As a result of such construction the slip driving connection no longer performs both the functions of pulling the cord from the balloon and of reeling it and thus more accurate control is possible of both the cord balloon and of the reeling operation.

The structure of the preferred illustrative embodiment of the cabling spindle shown in Figure 4 at the bottom portion thereof immediately above sleeve 88, and also the traversing cord laying device of the spindle are substan= tially similar to those described in the applica.

tion of Agresti, Serial No. 15,394, led March 17, 1948, now Patent4v No. 2,534,496.; vand entitled Constant Tension Elngated Material Handling Mechanism.v It isv to beunderstood, however,

that the improvement in they kcabling spindle of the invention may` be used to advantage in spin'- dl'es having otherv types of bobbin driving mechanisms and' cord'laying devices. such spindle. includes the twisting disc 92 keyed on shaft 88 immediately above sleeve 88, a cage supporting flange 84 lioatingly` mounted on shaft 86, and an upwardly dished guard 9B' affixed to the disc 92 and rotatable therewith. A weight 98 eccentrically Secured to the bottom of ange 94 maintains such Harige Yand the. cage structure carried therebyy in substantially one. angular position. The cage is formed by a plurality of spaced upstanding' rods |00, positioned around theedge of flange 941 and parallel to shaft 86. A ring |82 is secured to the tops of rods |88. Such cage structur forms the support for the traversing cord layinginechanisin and for the auxiliary cord driving capst'an presently to be described.

Connection between shaft. 86 and the bobbin support is effected'by means of the magnetic slip clutch generally designated |93. Such clutch includes a rotor member |811 keyed'to shaft |36-, such rotor member being made of magnetic material suchY fas soft iron, and having a depending skirt |05, the outer face of the skirt lying on the fru'stum of a cone.` The bobbin support consists of a flange |08 and an upstanding central tubular portion IIB both made of non-magnetic material, such bobbin support being oatingly mounted on the upper end of shaft 8S. The bobbin core ||2, in this instance, is cylindrical, such core having a transverse bottom flange IIA, the bobbin core also being made of non-magnetic material. The bobbin core Ais slidingly received over portion IB of the bobbin Support, the Weight of the bobbin Core and of the cord |28 wound thereon being sustained by the three non-magnetic pins |24 slidingly mounted in flange |08. The bobbin core is keyed for rotation with the bobbin support by' the driving connection generally designated |25.

The bottom ends of pins |25 rest upon the upper surface of the outer rotor member IHS of the magnetic clutch. Member H6, which is a strong permanent magnet, is provided with a plurality of radially directed poles i8, the inner faces of which lie on the frustrum of a cone the elements of which are parallel to those of the skirt |96. The outer magnetic clutch member H6 is supported from the outer edge of flange |88 through the medium of the upper and lower non-magnetic annular springs |28 and |22, re'- s'pectively. As increasing pressure is imposed upon pins |24 as a consequence to they building up of cord upon the bobbin core, magnetic clutch part ||8 is depressed and thus the air gap between parts |05 and I6 is decreased. The angles of the cones on which the confronting faces of parts |38 and lr6 of the clutch lie, and the characteristics of spring members iil and |22 are so chosen that the torque transmitted through the magnetic clutch varies substantially directly with the increase in weight of the bobbin core and the material wound thereon, whereby yarn is wound upon the bobbin under a substantially constant tension, when the bobbin core The cord |28 is withdrawn from the balloon 84 of the cabling spindle through passage |30 in twisting disc 92 from which it travels upwardly in the axial passage |32 in the upper end of shaft 8G. The cord in such latter portion of its travel is designated |34. In the described embodiment, the means at the spindle positively engaging and forwarding the cord, generally designated |35, takes the form of an auxiliary capstan supported at the upper end of the cage structure and positively driven from the upper end of shaft 36. The nally twisted cord |38, after emergence from its path axially of shaft 81E, and after its engagement by the auxiliary capstan |94, which will be more particularly described hereafter, is led around guide sheave |40 down around the further guide sheave |42 to the cord laying and guiding sheave |44 on the traversing cord laying mechanism, generally designated |46. From sheave |44 the cord |38 is laid upon the bobbin. As above indicated, the traversing cord laying device |46 is similar to that shown and described in the Agresti Patent No. 2,534,496. Such device includes the driven double worm |48, supported for rotation in the upper bearing |50 at the upper end of the cage and in the lower bearing |52 on flange 94. Worm |48 is rotated intermittently in timed relation with the rotation of the bobbin support, and thus of the bobbin, by means including a ratchet wheel |54 keyed to worm |48 and a single lobe cam 56 positioned on the lower edge of flange |08, the cam cooperating with a ratchet operating lever (not shown) supported on iiange 94, to rotate ratchet wheel |54 at each passage of the cam lobe by the ratchet lever.

The auxiliary capstan device |96 includes a sleeve member |58, the bottom end of which is reduced in diameter and telescopes within the needle bearing |50 positioned in a counterbore in the upper end of part of the bobbin support. Sleeve |58 furnishes support for the auxiliary hollow shaft |62, such shaft being supported at the top in bearing |64 in the sleeve |58 and at the bottom in bearing |66. The bottom end of the hollow driven shaft |62 is enlarged at |68, the lower end of such enlargement having on the edges of its sidewalls slots complementary to the projections on the sidewalls of the male clutch part |10, part |1|l being affixed on the upper end |12 of the driven shaft 8S. Sleeve |58 and shaft |62 are attached to the supporting plate |14 so as to be removable as a unit from the spindle with the plate. Plate |14 has an overhanging rim |1 and an inwardly projecting body |18 of such dimensions that the body fits within ring |02 and the rim overlies the ring. As shown in Figure 5, plate |14 has three openings |80 around its edge. The leading outer edges |84 of the plate adjoining the openings |80 are tapered in thickness so that the plate may be temporarily locked in place by positioning it on the ring |02 and then turning it counterclockwise (in Figure so that the edges |84 frictionally engage the inwardly projecting portions of clips |82 affixed to ring |02. Above plate |14 shaft |62 is provided with a small pulley |86. Spaced from shaft |52, as more clearly indicated in Figure 5, and journaled in plate |14 and the overarm |90 attached to plate |14, is the capstan shaft |88, which is positioned parallel to shafts 86 and |62. A large pulley |92 is keyed on shaft ist between the plate and overarm. Connection between pulleys |86 and |52 is afforded by belt |94, so that the capstan shaft is driven at reduced speed but in synchronism with shaft 86. Shaft |88 carries, keyed thereto at its upper end, a capstan |96 having a rst, bottom step |98, and a second, top step 200. Cord traveling upward through the axial passage in the upper end of shaft 86 and through hollow shaft |62 passes over the guide sheave 202, affixed to plate |14, and onto the first step |98 of the capstan. The cord passes around such first step several times, and is then led to the transfer sheave 204, supported on plate |14, from which it passes to the second step 200 of the capstan. After passing around such second step several times, the cord is led to guide sheaves |40 and |42, both supported on plate |14 as shown, and thence to the sheave |44 of the cord laying device, as previously described.

When the apparatus is used for making cords of materials such as rayon, the primary purpose of the auxiliary capstan is positively to engage the cord to furnish the power necessary to withdraw it from the balloon of the cabling spindle. It also functions as the governer of both the twisting and cabling operations, since the peripheral speed of the auxiliary capstan bears a definite, predetermined, relation to the speeds of rotation of the yarn twisting spindles and to the speed of rotation of the twisting disc of the twisting spindle. In a typical auxiliary capstan for use with materials such as rayon, the upper step 258 of the capstan will exceed the bottom step |33 thereof in diameter by one-half percent. Each step of the capstan is preferably tapered to increase in diameter an upward direction, a typical included angle of taper, in this example, being 4. As a result of such construction, the cord is very firmly gripped and is also slightly stretched, thereby giving it a substantially permanent lay.

The apparatus of the rst described embodiment may, with slight modification, be adapted for the more efficient forming of cords from yarns of materials such as cotton. Because, in some cases, it is desired that one device be used in the treating of both materials such as rayon and those such as cotton, there is shown in the embodiment of Figure l a driving connection from spindle 5 consisting of the worm 20B positioned on the bottom of the driven shaft of the spindle and the worm gear 2|0, supported on shaft 2|2, meshing therewith. When the apparatus is employed with a retarder gathering capstan 60 the driving connection on shaft 2|2 beyond gear 2|0 is disconnected at the universal joint 2|8 (Figure 3). However, when materials such as cotton are treated, it is desirable that the gathering capstan shall be driven. Figure 3 shows the apparatus of the second embodiment, such apparatus being identical with that above described except for the substitution of a positively driven gathering capstan 240, and the driving mechanism therefor, for the retarded capstan t0.

In Figure 3 the cabling spindle E and the parts thereof are identical with those shown in Figures l and 4 and thus are designated by the same reference characters. The threads, however, formed by twisting spindles as in the first embodiment, are designated 50 and 58', such threads being gathered at the driven capstan 240 from which they are fed downwardly into the balloon 84 of the cabling spindle. With threads formed of material such as cotton the sum of the tensions therein, as they are fed from their individual twisting spindles, exceeds the tension in the balloon of the cabling spindle. It is therefore neces sary, in order to secure balanced conditions throughout the system with balloons of the desired character at both the yarn twisting and Cabling spindles, te drive the. eetheiig capstanln Figure 3 such drive is provided fifeinth'e Shaft 52 I2, such shaft being suplrted by mer'ibers` 2|.6 depending from the transverse frame in mber 2 I4. The drive includes the universal joint 2 t8, the cross shaft 220, thel v belt 228 running over pulleys 224 and 23,0, and the upper cross shaft 232 journaled in pillow blocks 2,34 and- 236. In order to vary the peripheral speed of capstan 240 a change speed driving mechanism is ern.- ployed between shafts 220 and 232. In the embodiment shown, such speed change mechanism is provided by means of; the split pulley 224, one part of which is shiftable relative to the other, to vary the effective diameter of the pulley, by means of conventional inehanismiinelildinathe shift-ing flange shown at 226, the groove of which is engaged by an adjnstablyrpositioned yoke, not shown. In order to maintain belt 228 the desired taut condition there is provided; an ,adjustable belt tightening idler pulley 24,2 which engages one reach of the belt, pulley 2,42 being adjustable transversely of the run of the belt by reason of its mounting on the slide 244i, v,whipl-i is adjustable horizontally the worm 24.6;

The change speed driving connection between shafts 220 and 232 is adjusted, in the described manner, so that under steady running conditions the balloons in the threads delivered from the individual twisting spindles and the balloon 84 leading to the cabling spindle have the desired spans. Under such conditions the tension in balloon 84 plus the tension imposed upon threads 50 and 58 by driven capstan 240 equals the sum of the tensions in the balloons of the individual yarn twisting spindles. The auxiliary cord engaging capstan |96, in this embodiment as in the first, permits separation of the controls of the Y balloon 84 and of the reeling operation.

When the apparatus of the second embodiment is employed in treating material such as cotton the auxiliary capstan |96 may be modified as to its capstan step dimensions so that such capstan performs the further step of substantially normalizing the cabled thread and therefore reducing subsequent length variations therein. A typical auxiliary capstan for such purpose has both the upper and lower steps tapered, as in the first described embodiment, with an included angle of 4, for example, but the upper step exceeds the lower step in diameter by three or four percent. In this embodiment, therefore, in the passage of the cord from the lower to the upper step, the cord is subjected to substantial tension in the reaches thereof from the bottom step 198 of the capstan to the sheave 204, and from such sheave to the upper step 200 of the capstan.

Whereas we have described and illustrated preferred embodiments of the apparatus for and method of cabling threads in accordance with our invention, it is to be understood that such embodiments are illustrative only. The invention is capable of considerable variations as to details, and accordingly it is dened by the scope of the following claims.

We claim as new the following:

1. Apparatus for twisting and reeling elongated flexible material such as cord, which comprises a rotary driven spindle shaft disposed at a small acute angle to the vertical, a bobbin support mounted on the upper end of such spindle shaft, a slip driving connection between the spindle shaft and the bobbin support, a thread guide supporting cage surrounding the bobbin support and iloatingly mounted on the spindle shaft so as to ed thereon, the sup.- ng the spindle shaft he spindle shaft, a capcapstanbeing parallel to Athe 1 shaft, an auxiliary Shaft drive iugwly' enga wth the `upper end of the spindle shaft, a speed reducing driving means between ille. auxiliary shaft and the capstan, whereby the capstan is driven at; reduced speed and in synlilohsm with the spindle shaft, the capstan hava cord engaging step thereon, means for guiding .theACOH .Su-ing from the Aspindle shaft to and around the capstan step, and means for guiding the cord from the capstan step to the cord guiding and loading device, whereby cord fed from a point spaced above the upper end of the spindle shaft and coaxial therewith through the passageways in the twisting disc and the spindle shaft, around the capstan step as recited, to the guiding and loading device, and thence to the bobbin, in that order, is given a double twist when the spindle shaft is rotated and the cord is wound on the bobbin.

2. Apparatus for twisting and reeling elongated flexible material such as cord, which comprises a rotary driven spindle shaft disposed at a small acute angle to the vertical, a bobbin support mounted on the upper end of such spindle shaft, a slip driving connection between the spindle shaft and the bobbin support, such slip driving connection comprising a magnet attached to one of the group o-f elements consisting of the spindle shaft and bobbin support, and a rotor attached ito the other element of such group, the magnet and rotor being located in spaced relationship soy as to induce electric current in the rotor upon relative motion between the spindle shaft and the bobbin support, a thread guide supporting cage surrounding the bobbin support and iloatingly mounted on the spindle shaft so as to be maintained in a relatively stationary position, means for maintaining .the cage structure in such position including an eccentrically located weight attached thereto, a twisting device mounted on the spindle shaft, the twisting device including a twisting disc mounted below the cage structure for rotation with the spindle shaft, the spindle shaft having an axial passage in its upper end, the twisting disc having a substantially radial passage therethrough connected with the passage in the spindle shaft, the cage having a cord guiding and loading device thereon, the cage having a supporting structure located thereon, the supporting structure spanning the spindle shaft above the upper end of the spindle shaft, a capstan rotatably carried by said supporting structure, the axis of the capstan being parallel to the axis of the spindle shaft, a hollow auxiliary driving shaft telescoping and drivingly engaged with the upper end of the spindle shaft and coaxial therewith, a speed reducing driving means between the hollow shaft and the capstan, whereby the capstan is driven at reduced speed and insynchronism with the spindle shaft, the capstan having atleast two axially spaced cord engaging steps thereon, one such step somewhat exceeding the other step in diameter, means for guiding the cord issuing from the spindle shaft and the hollow auxiliary driving shaft to and around the smaller capstan step, means including a guide -sheave spaced from the capstan for transferring the cord from the smaller step of the capstan to the larger step thereof, and means for guiding the cord from the larger capstan step to the cord guiding and loading device, whereby cord fed from a point spaced above .the upper end of the spindle shaft and coaxial therewith through the passageways in the twisting disc, the spindle shaft, and the hollow auxiliary driving shaft,

positioned between thesingles twisters and the doubling means forcollecting strands passing 'from the twisters to the. doubling means into a group and discharging the group under uniform tension, a rotatable thread-advancing roll for drawing the pliedY strand into the doubling means, said roll mounted on the doubling means and disposed to receive the plied strand from the bore of the hollow spindle shaft, a. hollow axial extension of the spindle shaft, and means connecting the roll and the spindle shaft extension in positive driving relationship.

GEORGE W. BOGDANFFY. CLYDE O. MITCHELL.

HENRY C. UHLIG.

Referencesl Citedin the file of this patent UNITED STATES PATENTS Number Name Date 671,101 Bek Apr. 2, 1901 691,797 Norman Jan. 28, 1902 723,178 Norman Mar. 17, 1903 1,858,528 Somerville May 1'7, 1932 2,053,645 Weaver Sept. 8, 1936 2,410,674 Nelson Nov. 5, 1946 

